Puanoofraph co



0. MALCHER.,

CALCULATING MACHINEI 'APPLlcATmN FILED 111111.19. 1914.

Patented 001.1111919,

1 SHEETS-SHEET 1.

Anqqaaaaa 0. MALCHER.

CALCULATING MACHINE. APPLcATIoN min M519. 1914.

1,318,395. Patented 00t.14,1919

v 7 SHEETS-SHEET 2.

o. MLCHER.

CALCULATING MACHINE.

APPLICATION FILED mums. 1914.

Patented Oct 14; 1919.

7 SHEETS-SHEET 3.

THB CULUMBIA PMNodHPl-l Co., WASHINGTON. D. c.

o. MALCHER.

CALCULATING MACHINE.

APPLICATON FILED MAR-19, i914. l1 ,$18,395. K Patented Oct. 14,1919.

` 7 SHEETS-SHEET 4- rmz commmm PLANOGAPH' co.. WASHINGTON, nx c.V

- 0. MALCHE'R.

CALCULATING MACHINE.

APPLICATION FILED MAR. I9g 191A.

Patented 00u14, 1919.`

7 SHEETS-SHEET 5.

0. MALCHER.

CALCULATING MACHINE.

APP`LICAT2ON FILED MAR. I9. 1914.

,15318,395, Patented 0t.14,1919.

7 SHEETS-SHEET 6.

0. MALCHER.

CALCUL/111116 MACHINE.

APPLlCATlON FILED MAR. I9. 1914.

rammed 001. 14,1919.A

ms coLv'n'nn PLANouRim so., WAsmNn-row. 011.1

motion of the elements thereof necessary in calculating. A main drive shaft is provided which rotates a quarter of a cycle for each calculatiom during whichthe racks are released, allowing the machine to place the number set up on the keyboard in the total# izcr and at the same time set up the printing mechanism Vfor listing the numbers orv items. A secondary drive shaft is provided which rotates a complete cycle at each calculation,

j subsequent to the movement of the Vmain drive shaft, which' movement ,causes the' Y printing mechanism to list the items or numbers and returns all of the elements of the mechanism to their initial positions.

The machine comprises a base plate 10 provided withthe casing 11 which Vconipletely surrounds the mechanism of the machine with the exception of the carriage 12 and its associated elements at the rear of the iiiacliinel/` The machine also embodies al cover which is" `readily removable. It will be apparent that the construction of the base plate', casing and cover is merely a matteryofY design and manufacture, and forms no part ofthie present invention.

Kelli/board.

The keys-amiti u1@ prsent invention' is a leXiblejor'`V selfecorrecting keyboard; 'that is to say,- if itis desired, after an insertion has been made by depressing a key to make another insertion by depressing another key in the same decimal order, the orginally depressed `key vis auton'iatically released upon the operation of 'the second key. Furthermore, the keyboard is constructed in units,

' the keys of each decimal order constituting and to a top plate 14,' 'said 4uiiit-s resting oneV against the other and forming in combination, when securedvt'o the 'casing aforesaid, a complete mechanism. r1`he top plate 14C of each decimal order is pierced by nine key stems 15, which extend through the U frame 13, said frame in combination with the plate ltfactingas a guide for the keys. 1n Fig. 11 is'illustrated one of the keys, which comprises astein 15 provided upon one side thereof with a stop 16, which contacts with a bar 17 interposed between the arms of the frame 13 adjacent to the top plate 14. An

`oriiced projection 18 isV formed on each key stem, to which is secured a spring 19, the upper terminal of which is attached to the bar 17 Adjacent to the lower terminal of thestem of the key is the key lock 20, which comprises a projection formed on one side of the key, having two inclined faces 20 and 20, the upper face 20 being longer than the lower inclined face 20, said faces ubeing separated by a lock notch 20m;V The lower terminals of the ste-nis of the keys, with the exception of the ,1 key in each order, which is straight, are offset to form the rack stops 21, said stops being projected into'the path of movement of the racks. j

f A lock bar 22 is pivoted between the arms of theV frame 13 and performs the double purpose of lockingthe keys iii depressed 13osition and locking theracks., as will be here'- inafter more fully described, against in'ovement prior to the depression of the keys. This lock rbar carries a downwardly proj ectM ing lock 23 at its forward terminal which, prior to the depression of any key, lies` directly within the path of the coperating rack, as will be hereinafter more fully described, and prevents liability of anymovement on thepart of the latter prior to the depression of any one of the keys in that `particular decimal order. 1t will be noticedV by reference to Figs. 2, 3 and el., th'atthe body of this lock bar 22 rests at an angle to the face of the key stems 15.

soV

Upon the depression of anyone key iii a series or decimal ordentlie inclined surface or face 20 of the key lock 20 operates against the lock bar 22 and causes the' saine VVto ride outwardly and drop into the lock notch 20. The lock bar 22, coperating with the lock notch 20', locks the key in its depressed positionand the rackstop 21 thereof in the path of the coperating rack, as vwill be hereinafter apparent..1 The depression ofanother key in the series causes the inclined face 20." ofthat'key to pass the lock bar 22 and theincliiiedface 20 thereof to operate Yagainst said lock bar; and, as said face 20 is of greater length than'the face 20., said lock bar will ride outwardly upon the face 20of the secon'rdfjdepressed key and thus be moved from engagement with a lock notch 20.of the first depressed key, permitting the spring -19 Ato act there# on. This returns the first depressed key to iio its initial position, while the second def Y pressed key when the pressure Vis removed therefrom moves slightly in an upward di rcction until the lock bar 22 gravit-ates into the lock notch 20.l Hence, afterthe de-` pression of one key in a series, a second key Y in the saine series or decimal ordermay be depressed, releasing said first depressed keyl and locking the second key Vin an operative Y position.

The units for .all the decimal orders of the keyboard are identical inv construction and constitute what niightrbe' termed the keyboard of the machine, though said keyboard also involves totalizer setting keys, an automatic clearing key, an error key and a repeat key, all-of which elements, though forming' part of the keyboard, will be described specifically in connection with the mechanism with whichthey cooperate..V

row of keys and adapted to be stopped inA various positions bythe rack stops 21 of the keys. Themovement of these racks forwardly until they contact withthe cooperat-` ingrack stop 21 operates the totalizer. for the calculation, and at the same time sets up the printing mechanism.

interposed between the longitudinal sides of the casing 11 are a pair of shafts 24C and 25, Figs. 2, 3, 4, 5, and 7, -the shaft v24k being located adjacent to the forward terminal of the keyboard, while the shaft 25 islocated adjacent to the Vrear `terminal thereof. Mounted upon these two shaftsV and under each decimal order of the keys is a slide 26, said slide being provided with a slot 27 at its forward endand a slot 28 at its rearward terminal, forv the reception of said shafts and the reciprocation of the slides thereon. The rear slot 28 is provided atl its forward terminalv with an enlargement 29 (Fig. 3), which forms a projection 29a in said slot whereby the slides may be locked, as will be hereinafter apparent. These slides are placed on edge in the'machine and are provided with a plurality of projections 30 thereon, which extend horizontally from the upper edge of. said slides uponl alternate sides thereof. These projections are' adapted to contact with the rack stops 21 of the keys to limit the movement of the slides 26 and consequently the racks, dependent upon the key depressed, 'thereby supplying the necessary varied movement to the racks.

Each slide is also provided with a projection 31 on its lower edge, to which is securedl a'spring 32, said spring extending to the forward wall of the leasing, where it is secured. .These springs act upon the slides 26 to draw them toward the forward end of the machine when the same are released,

said springs being the source of power by means of which the calculations are performed; The forward terminals of the slidesare providedl with depressions 33, which cooperate with the projecting locks 23 of the lock bars 22 tolo'ck said slides until a key` is depressed in the decimal order for that slide, after which the lock bar 22 is swung outwardly and the projecting lock 23 is likewise moved from the path of the slide 26.` These depressions 33V also coperate with1 keys of the keyboard to take the pla-ce of thestops 30, and as the l keysarestraight thel depression thereof causes the ends to extend into the depressions 33 when the slides move Y forwardly. The rear terminals of the slides vthe 9 key is vdepressed than when the are provided with thervertical extensions 34,

whichcarry at 4their, upper terminals the, `horizontal extensions 35, in which arev formed j j theracks 36. These racks 36are formed 0n eachside of a slot arranged within each extension 35 and arey double racks, for the purposes of carrying out addition and subtraction without changing the. directionr of operation of the elements of the machine other than the totalizeritself. Y Y 1 In order to connect the slides, and racks with the printing mechanism so that the saine may be set by the -movemcnt ofthe44 slides, the latter are providedwith the ex tensions 37 which project to the rear ofi the machine and carry at their rear terminals the bifurcated uprights38,lFigs. 2 and 3. Each" upright 38 is connected directly to a printing segment and takes the same varied movement as does its cooperating slide and rack, and'hence sets the printing ymechanism to correspond tothe number placed in4 the totalizer. f The extensions 37 are oset toward the center of the machine from both .sides thereof, as illustrated in Fig. 7, in ordery to have the connectionsbetween the racks and the printing segments consolidated, as necessi-V tated by the decimal orders of the numbers.

When a key ofa series lis depressed, the rack stop 21 thereofiwill project into the path of one of thejprojections'30 upon the slides, and. when: saidA projection contacts with'said stop the ,rack will be held stationary. The m'ovementof the rack is dependent upon the key depressedgfthat is to say,

the rack will have alarger movement when l keyis depressed, thus imparting a varied" Primary cmd secondary/do@ shafts.,

The `power of the presentmachine is obtained from a crank 39 Figs.' l and located upon .the exterior of vand `to one side of the machine. It is the purpose of this crank to impart a quarter of a turn to the primary drive shaft 40 which is interposed between the side walls `of the casing. lt can be readily understood that Vthough the present machine receives its power manually, a suitable motor orvother" mechanical power-imparting mechanism can be substi-Y tuted for theV crank.

Extending completely across the machine and parallel to said primary drive sha-ft 40 is a secondary driveY shaft 4l, which has keyed thereto gear, 4t2 which meshesl withl a gear 43 loosely mounted upon the primaryv nected atits outer terminal to a ratchet 45 Figs. 2, 7 and 16, which is likewise loosely mounted upon the primary drive shaft 40. A second ratchet 46 is keyed to the primary drive shaft to rotate therewith. Loos'ely .mounted (upon the primary drive shaft 40 and adjacent lto the ratchet 46 a bell crank 47 Fig. 2, one arm of which is provided with a lug 48 which projects through a curved' slot in the adjacent wall of the casing 1l andeonnects upon the 'exterior'of said wall with the crank 39, which is loosely mounted upon a 'projectingterminal of the primary drive shaft 40 Figs. 2 and 7. It

. Vwill thus Vbe seen Vthat as the crank 39 is oseillated rabout the primary drive shaft 40,

a similar movement will be imparted to the bell crank 47. The'opposite arm of the'bell crank is connected to a coil spring 49 which vextends to thefforward part of the machine,

where it is secured tof the casing 11. This spring acts upony the: 'bell crank to return the same to its initial Vposition aftersthe crank 39 has been pulled forwardly. Two opposed pawls 50, 5l Figs. 2 and 16 are mountedV upon an extension of the lug 48 adjacent to the bell crank 47. The pawl 50 is adaptedtocoperate with the ratchet 45, while the pawl 51 is adapted to cooperate with the ratchet 46; The terminals of the pawls are connected by the spring 52, which forcesV 'the pawls into engagement with their respective ratchets.

vWhen the crank 39 is pulled toward the forward Vend of the machine, the pawl 51 engages the respective ratchet 46 and rotates the primary drive shaft 40 a quarter of a revolution inthe direction of the arrow in Figs. v2, 6 and 16, as the ratchet 46 is keyed to the primarygdrive shaft 40. When the handle is released after completing its forf ward movement, the spring 49 operating upon the bell crank 47 oscillates the bell crank, returning the crank 39 to its original position and causing the pawl 50 to engage the ratchet 45. This movement of the ratchet is imparted through the 4sleeve 44 to the gear 43, rotating v,the same in' the direction ofv therarrowin Fig4. As the gear 43 meshes with the gear 42, the latter will be rotated a complete revolution in the direction of the arrow in Fig. 4; f

The primary drive shaft constantly Vrotates in the direction of thearrow inFig.

handle before it reaches its eXtreme forward i position, the ratchet wheel 45 willv not be engaged by the pawl 50, and there will be Vno operation of thercomputing mechanism during the return movement of the handle. It will be necessary for the operator again to move the handle forwardly in order toV engage the pawl with its ratchet wheel,' and there will be no operation of the mechn anism on the return stroke, until the handle has been moved to its eXtreme forward position to complete the operation performed by the forward stroke of the handle. Because of this arrangement, thereV is no possibility of disturbing the proper sequenceof operation of the computing mechanism by failure to move the Vhandle through a full stroke. The fact that the two shafts 40 and 41 are operated entirely Aindependently of one another, each remaining stationary duringthe movement of the other, and the fact that the shaft 41 cannot be operated until the movements controlled by the shaft40A are n completed, insures proper sequence of operation of the computing mechanism. Moreover, in case the shaft 40 is not moved a sufficient amount to complete the operations performed by the forward rotation ofthe handle because of an insuiiicient movement of the handle'7 this shaft will: remain in the position yto which it has been moved, until the operator again moves theJ handle to complete the forward stroke, because of the fact that on the return movementof the handle, the dog 51 slides over the ratchet wheel 46, and does not carry the ratchet wheel backwardly with it.

Y Rack Z007@ md release.V

Under normal conditions-that is to say, when the machine is inoperative-the racks are locked against forward reciprocation, but [after any Yof, the denominational keys have been set and movement is imparted to the'crank39, the first portion of said movement releases the ,racks and permits the same to moveunder the influencejof the springs 32 until Vthey' contact with the keys set. This unlocking action4 ofV the slides also locks the lockbars 22 of the keys against movement, therebyA preventing-jl any key in the series from being depressed or operated Y during the forward and return `movements of the crank 39,

Mounted on the 'shaftr25 adjacent to each 1 terminal thereof, isV a' bell vcrank 53, Figs. 2, 3, and 4,'which bell cranks are connected attheir 'forward terminals yby Vthe bar 54.

This bar rests in the enlargements 29 of the slots 28 in slides 26 and bears against the projections r29a formed by;V said enlarge# ments, thereby locking the slides and racks against movement. The rear end of the bell cranks 53 'coperates with cams 55 Figs. 1,

3,V 4and 18 mounted upon the primary `crank levers 53 successively.

drive shaft 40, each of vsaid cams beingprovided with four projecting cam surfaces 55, which coperate with the tails of the bell Vihen the shaft 40 rotates a quarter of a turn in the forward direction, the cam surfaces 55 adjacent to the tails of the bell cranks 53 will oscillate said bell cranks about the shaft 25, hence lowering the bar 54 from its contact with the shoulders 29L formed bythe enlargements `29. This permits the slides 26 to move forwardly under the influence of the springs 32 and cause the bar 54 to ride upon the projection 29L of the slot 28 in each slide.

As soon as the cam surfaces 55 passfrom engagement with the tails of the bell cranks -53 and the slides are returned to their normal positions, the bell cranks will be returned to their locking positions by the spring 523il thereby moving the tails thereof into the paths of the neXt cam surfaces 55.

Each bell crank 53 is provided with an upward extension 56 between the terminals of which is interposed a bar 57, which rests normally elevated above the lock bars '22 of the keys. When the bell cranks 53 are oscillated about the shaft 25, and the forward terminals thereof are lowered to release the slides and racks, this movement will cause the bar 57 to bear upon the lock bars 22 of the keysV and prevent said lock bars' from being oscillated, and hence Vany keys from being depressed durinor the operation of the machine. This bar 5( is held in this position by the action of the projections 29a of the slides upon the bar 54, locking the forward terminals of the vbell cranks 53 in their lowered positions. When the slides are returned and the forwardr terminalsof the bell cranks are elevated, the bar 57 is likewise elevated, releasing` the lock bars 22 of the keys and permitting the depression of any keys.

Totalzer.

The totalizer utilized in the present invention is what is known as a reversible totalizer, that is to say, it will operate and carry in both directions to add and subtract. This totalizer is constructed in units or sections, each unit comprising aA numeral wheel, means for drivingthe numeral wheel from the racks, a truing mechanism for taking up the lost motion, a carrying wheel which is connected with the unit of the next adjacenthigher decimal order, and a clearingv wheel.

A shaft 58 Figs. 1 to 7 is mounted between the side walls of the casing 11 and constitutes the main shaft ofthe totalizer. The units of the totalizer for each decimal order are mounted upon this shaft in `sufficiently spaced relation to accommodate the various coperating mechanisms. Inasmuch as all of the units are of similar construction and arrangementfwith the exception oftheunit of lthe highest decimal order which has noone-toothed carrying gear, it will be only necessary to describe one of these units. I Y

j The numeral wheel 59 is loosely mounted upon the shaft 58 land is constructed somewhat after the manner of a drum, as is illustrated in Fig. 7 Mounted upon the shaft 58` and attached to the interior of the4 numeral Wheel is a gear 60 (Figs. 7 and 9), which constitutes the means whereby the power or rotary motion is transmitted directly to the numeral wheel. Loosely mounted upon the shaft 58 and adjacent to the open face of the numeral Wheel 59 is a gear 6l, which is spaced slightly from thenuineral wheel aforesaid` A stud shaft 62 pierces the gear 61 (FigsQS and 9) and carj nThis gear 66 in turn meshes with a gear 67 carried by a bracket 68 keyed to the shaft 58. This gear 67 is adapted to be swung 'into Contactwith either side of the rack 36 to receivemotion therefrom as said rack is moved forwardly. The motion receivedby.

the gear 67 fromfthe rack 36 will be transmitted to the gear 66, hence to the gear and the gear 63, and to the numeral wheel `59 through the medium of the gears 64 and 60. This motion is varied by the/movement of the racks, which is limited by vthe keys depressed.4 Located upon theshaft 58 adjacent to the closed face of the numeral whee159 is a star gear 69, by means of which the numeral wheel is trued to take up lost motion.V Adjacent to the star gear 69 is a one-toothed carrying gear 70, the tooth thereof being located adjacent the 9 on the periphery of the numeral wheel, and is adapted tocarry l to the numeral wheel of the higher decimal order asthenumeral wheel passes from 9 to zero. Mounted on the shaft 58 neXtto the carrying wheel 70 is an automatic clearing wheel 71, provided with one tooth or projection which is located adj acent vto the zero on each numeral wheel, the utility ofwhich will be hereinaftermore fullyl described. It is apparent that each unit comprises a gear 61 with its associated gears 63, 64, 65, 66 and 67, a numeral wheel 59,4the star gear `69, la carrying gear 7 0,1and an automatic clearing gear 7l, all of which are loosely mounted upon the shaft 58, one unit of the totalizerfbeing spaced from the adjacent unit by suitable collars'. The 'gear 61 of each unit of the totalizer isl loosely mounted for rotation upon the shaft 58, with the exception of thev gear 61 of the units order, which is held against rotation by yany suitable means. Thegear 60, 'the numeral Wheel 59, the star gear 69, the carrying gear and the automatic clearing wheel 71 of each unit, operate as a single element, being ysecured one to the other.

Loosely mounted upon the drive shaft 40 directlyY under the carrying gear 7 0 is a Geneva escapement 72, connected by a sleeve 73 with a gear 74: Figs, 2 and 7. This Geneva escapement 72. is adapted to mesh at vpredeterm ined intervals with the tooth of `ne,Xt higher decimal order, which motion is accordingly transmitted through the gears v63, 64 and 60 to the y numeral Wheel of that order. The rotation of the gear 6.1 shifts the position of the Astub shaft 62 and the idler 641 thus shifting the fulcrum point of xthe pinion 64 relative to the pinion60, and `so shifts the pinion 60 together with its numeral wheel ,5 9 one point.

By this construction, vit is possible to obtainA a carrying mechanism which will op- Grate irrespective of the direction of rotation of the elements of the totalizer, and which vwill also carry from one decimal order to the neXt decimal order simultaneously with `the calculation.

wheels which, if n Ot corrected, would destroy the accuracy ofthe resultante. In order to obviate this lost motion and entirely eliminate the same, the star gear 69 of each unit of the totalizer is alined with a truing idog 7 5 Figs. 8, 5, and 7 loosely pivoted upon the Vprimary drive shaft 10 and adapted to enter between the teeth of the star gear 69 and. take up any lost motion which may occur in its respective unit, the

Atail of each dog coperating with a cam 76 Orders will be .trued successively; that is to say, the truing .dog 75 of the units order will enter between the teeth of the star gear 69 and completely true the `same prior to the entrance of the tru'ng dog into the Star Setting mechanism.

When the machine is inoperative, that is to say prior to any calculation, the gear 67 and its bracket 68 are so positioned that the -gear does not mesh with either side of the rack 36, and hence if the racks are permitted to reciprocate no calculation will occur. In order to render the machine operative, it is necessary to set the mechanism so that when the shaft 10 begins its quarter cyclerotation forwardly, the gear 67 will be immediately and instantaneously thrown in mesh with one or the other side of the coperating rack 36.

To accomplish this, the keyboard is provided with two keys 77 and 78 illustrated in detail in Fig. 6, mounted in a unit of said keyboard, similar in'construction to the remaining units thereof. A shaft 8O passes directly under the keys 77 and 78, the stems of which are offset in opposite directions to permit the passage of the yshaft therebetween. This shaft terminates at its rear terminal in the vertical plane of the shafts 4,0 and 58. The opposite sides of the `shaft 80 adjacent each of the keys 77 `and 78 are provided with the pins 81, which enter into a-slot 82 in the offset portion of each key. Then the key 78 is depressed, cooperation .thereof with its pin 81 will cause the shaft 80 Ito be rotated inione direction, whereas if the key 77 is depressed the cooperation thereof with its pin 81 will cause the shaft to be oscillated in the opposite direction. A disk 83 Fig. 15 is mounted upon the forward terminal of ,the shaft 8O and is provided with three depressions, one central and one upon each side thereof. These depressions coperate with a stationary springpressed p awl 841. By this means, the shaft is locked against accidental movement in 'segment 85 Figs. 6, 7 and 14 meshes with a rack upon a block 86 keyed for reciproca- `tion upon the totalizer shaft 58, to which are also keyed the brackets 68 carrying the gears 67 as before described.. On the opposite sides .of this block 86 are a pair of pins 87 and 88 Figs. 1., 6., 7, and 14, which project from said block in the same horizontal plane vbut which are spaced one from the other `as to the vertical planes thereof, as illustrated in Fig. 1. Mounted for vertical reciprocation uponthe primary drive shaft 40 `and the totalizer shaft 58 is a slide 89 1F igs. 6 and 14, which is offset at its lower terminal for the accommodation ofthe cam 90 keyed to the primary drive shaft 40 and adapted to rotate therewith in the direction ofthe arrow in Fig.- 6. Adjacent to the offset portion of the slide 89 is a tooth 91 which contacts with the periphery of the cam 90 for the vertical reciprocation of the slide at predetermined intervals by said cam. A bearing 87 is formed on one side of the` slide 89,`while a bearing 88 is formed on the opposite side of the slide 89, said bearings eX-. tending' therefrom at right angles to the body of the slide and are pro-vided with upwardly extending contact portions .87 and 88, respectively. These contact portions Aare adapted at predetermined intervals to Contact with their respective pins 87, 88, and oscillate the totalizer shaft 58 when the lslide 89 is reciprocated vertically.

A plate 92 Fig. 14 loosely mounted upon the primary drive shaft 10 is connected to the bearings 87 and 88 by a pair of springs `93, which draw the slide 89 downwardly and the tooth 91 thereof in constant contact with the cam 90. 'Under normal conditions, when the shaft 8OV is in its medial positionand held insuch' it is possible to print without calculating.

Should, however, the key 78 be depressed, the shaft 80 willv be oscillated to the right,

kbringing the pin 87 into alinement with its coperating contact 87. When the parts are in this position, a quarter cycle movement of the primary drive shaft 4:0 will immediately, through the medium of the cam 90, reciprocate the slide 89 upwardly to cause the contact 87 to bear against the pin4 87 and oscillate lthe totalizer shaft 58,

moving all of the brackets 68 upwardly and Vbringing the gearsj67 carried thereby into contact with the upper sides of the racks 36. If, however, on the contrary the key 77 is depressechthe shaft 80 will be oscillated in the opposite direction, causing the contact 88" to bebrought into alinement with its cooperating pin 88. 'When the primary drive shaft then takes its quarter cycle of rotation, the cam 90 forces the slide 89 upwardly, causing the contact 88 to bear upon the pin 88, oscillating the totalizer shaft 58 forwardly and moving all of the brackets 68 keyed thereto downwardly, and the gears 67 carried thereby into mesh with the lower.

side of the racks 36.

It is therefore apparent that `when the 65 machine is passive, the numberbearing members -or numeral wheels 59 of the totalizer are wholly disconnected from the racks 36, due to theneutral positions of the gears 67; and when the motion is imparted to the "primary drive` shaft 40, the initial movement thereof will undernormal conditions set'the` totalizer, by meshing the gears 67 with one side or the other of the racks 36.

The direction of rotation of the totalizer, and consequently the nature of the calculation performed thereon, is hence determined rotation of the primary drive shaft 40. At

the end of this quarter cycle of rotation, the tooth 91, Figs. 6 and 14, enters one ofthe notches formed in the cam 90, thereby permitting the springs 93to Vact uponthe slide 89, returning the totalizer shaft 58and the gears 67 controlled thereby to their neutral positions. This permits the slides 26 toA be returnedAto' their normal positions against the influence of the springs 32 without affecting the totalizer. Thusthe calculation isonly performed upon the quarter cycle movement of the primary drive shaft 40.

After the quarterv cycle movement of the primary drive shaft 40, it is necessary to return the shaft 58 and the gears 67 to their neutral positions, which is accomplished by an arm 94, Fig. 6, provided with the notch 95 in its `terminal and keyed to the'totaliz'er shaft V58 adjacent to the slide 89. The

straight sloping sides of the notch 95, coperate with a pin 96 formed at'the upper ter minal of the slide'89. An arm 97 is loosely mounted on the primary drive 'shaft 40 and is connected by means of a coil spring 98to an arm 99'keyed to the totalizer shaft 58 Fig. 7. As the movement of the slide 89 rocks the totalizer shaft 58 in one or the other of its directions, the pin 96prides upwardly on oneor the other of the inclined sides of the notch 95, and when the tooth 91 of the slide89 enters one of the depressions or notches of the cam 90 under the infiuence of the springs 93, the action of these springs upon the slide causes the pin 96 to ride downwardly` upon one or the other of the straight sides of the slot 95, thus returning the totalizer shaft to its neutral position.

The spring' 98 acting betweenthe arms 97 and 99`tends to holdthe shaftl 58 and the gears 67 normally in their neutral positions,

Yirrespective of the action of the slide 89.

It is thus apparent that the springs 98 and 93 act upon the shaft 58 to normally hold the same in its neutral position, and tounder normal conditions retain the totalizer inactive. Y

When it is desired to use the machine for printing and perform no calculations, it is necessary to shift the totalizer control shaft 80 into its neutral position, so that the contacts `87 and 88 will pass the pins 87 88 upon the reciprocation of the slide 89, Without bearing thercagainst, thus retaining the shaft 58 in its neutral position under the in- V`fluence of the spring 98. This is accomplished by the non-calculate key 100 mounted in the same unit ofthe keyboard as the keys 77 and 78, which is bifurcated (Fig. 20) as at 101 to form the arms 101 and 101D, which are located upon opposite sides of the shaft 80, and each of Which is provided with a slot 102. The shaft 8O is provided With a normally horizontal transverse pin 103, which is engaged by the slots 102 aforesaid, said pin extending on each side of the shaft for simultaneous engage-V ment with both of the slots 102. The key 100 is provided With an elevating spring 104. When this key 100 is depressed, irrespective of the adjusted position of the shaft 80, the terminal of one or the other of the slots 102 Will contact With the coperating terminal of the pin 103 and rotate the shaft until both ends of the pin 108 contact With both terminals of the slots 102 and the plunger 84 enters the medial notch of the disk 83. The pin 108 assumes a horizontal position, and the shaft 80 is in such a position that the reciprocation of the slide 89 does not affect the totalizer shaft 58. The spring 98 acting upon the shaft 58 retains said shaft in its neutral position and hence, when the machine is operated and the slides 26 reciprocated, the number set upon the keyboard Will be printed and not registered upon the total- When the shaft 58 is rocked by the action of the slide 89, the arm or brackets 68 carrying the gears 67 raise and lower the gears according to the direction of rotation of the shaft 58, causing the gears 67 to ride around their meshing gears 66. This riding ofthe gears 67 about their meshing gears 66 tends to rotate the gears 66 and move the totalizer Wheels, Vthereby destroying the accuracy of the machine. It is therefore desirable to lock the totalizer elements or units during the setting of the gears 67 and prior to the release of the slides and racks 26 and 36, respectively.

A totalizer lock shaft 105 Figs. 3 and 4 is provided adjacent to the primary drive shaft 40, and the totalizer shaft 58, and at intervals throughout its entire length has Vkeyed thereto the locking arms 106, Which are offset at their terminals for engagement With the gears 66. One of these arms is provided for each totalizer unit and is so located that it extends between the numberbearing member of one unit and the rack of the next adjacent unit, and engages the gear terminals of the arms 106 into engagement l with the teeth of the gears 66, thereby locking said gears from movement. This arm 107 coperates .With the cam 109 Figs. 4 and 19 keyed to the primary drive shaft 40, at

one terminal thereof (Figs. 3 and 4), which cam is provided with four cam surfaces 110, each of which corresponds to one-eighth of a revolution of the primary drive shaft 40. When movement is imparted to the primary drive shaft 40 to rotate the same a quarter of a revolution forwardly, the arm 107 rides upon the body of the cam 109, as illustrated in Fig. 4, thereby permitting the arms 106I to Vlock the gears 66 from movement; and it is during this initial period of movement. on the part of the primary drive shaft that the totalizer shaft 58 is rocked and the gears 67 set to mesh With one side Vor the other of the racks 36. Therefore, during an eighth of a revolution of the primary drive shaft 40, oronehalf of its l complete movement during a single operation of the machine, the totalizer remains stationary and is set for either addition or subtraction. y Y

By reference to Fig. 4, it Will be apparent that the correlation' between theV cam 55 and the cam 109 kis such that While the arm 107 operates against the body of the cam 109, to-Wit, between two of the cam surfaces 110, the tails of the bell cranks 53 `do not contact with the cam surfaces 55 of the cams 55; but when the arm 107 rides upon one of the cam surfaces 110 of the cam 109, one of the cam surfaces 55 of each of the cams 55 contacts With the tails of the bell' cranks 53 to release the slides 26. Therefore, the first eighth of a revolution of the primary drive shaft 40, or one-half of its complete movement during any one calculation, is devoted to setting the totalizer for either addition or subtraction, and said totalizer and its coperating slides and racks 26 and 36, respectively, are locked from rotation; and the second eighth of its revolution, to- Wit, the second half of its complete move- .ment duringa single calculation is devoted Printing mechanism.

The printing mechanism utilized in the present machine is set and adjusted directly by the movement of the slides 26 and is operated to record'the numbers set up on the machine. upon the return movement of the handle or crank 39; that is to say, as the slides 26 operate forwardly to perform the calculation upon the totalizer, this movement adjusts the printing segments to bring the proper type faces into alinement, and when the handle is released for its return movement the `printing operation takes place just prior to the return of all of the movable elements to their normal andina@- tive positions.` f

As heretofore described, the extensions 37 of the slides 26 are arranged compactly at the center and rear of the machine and are provided with the bifurcated uprights 38, to which the printing segments Figs. 1, 2, and 3 are connected. A casing 111 surrounds the extensions 37 of the slides 26 and is designed vto inclose the printing mechanism and constitute a bearing for the shaft 112. A transverse bar 113 is'interposed betweenthe wallsof the casing` 111 adjacent to the top thereof and is provided with the dependent segmental guides 114 Figs. 3 and 12, which guides are spaced one from the .other. Each type guide is shouldered to form an extension `115. A type segment 116 Figs. 3, 12, and 13 is mounted for reciprocation in the'shoulder portion ofeach guide 114 and va,f ainst the extension 115 thereof, said segment being provided at its lower terminal with an arm 117 Fig. 3 which is journaled on the shaft 112. At the joint between eachtype segment 116 and its arm 117 is a stud 118, which is received in the bifurcation of the bifurcated upright 38 of the adjacent ex` tension 37. AS the slides 26 are released, the extensions 37 thereof will move therewith and swing the arms 117 and the type segments116v about the shaft 112, which movement is proportionate to the movement of the slide 26 and is regulated by the denominational key depressed. As illustrated in Fig. 12, the segment 116 is provided with the outstanding ribs 119. `The type faces 120 are provided with the necksor extensions 121, which at their terminals are offset to form'the shoulders 122-. The extensions 121 of the type faces rest between the'ribs 119 of the segments 116 and bear againstthe face or the body of the guides 114. The type of each order are held in position bythe next adjacent guide 114, with the exception of the type provided for the units denomi-y national order, which are held in place by a curved plate 123 (Figs. 12v and 13). Opposite the printing line, each guide 114 is provided with a slot 124, in which the hammers operate and engage the noses or shoulders 122 of the t pe,as will be hereinafter morey fully descri ed.

It will therefore be apparent that as the slides 26 are released and moved forwardly, the corresponding segments '116 are adjusted, bringing the proper type ,to correspond with the key depressed into the plane ofthe printing line `and also into alinement with the coperating hammer slots 124 of the guides 114. VVh'en the hammer is released and operates against the type so set, the type is brought forward against the is Va pair of lshafts orsupports 12.5, Figs. 2` 4and 3, upon whichV are mounted the hammers 126, for reciprocation.` Each hammer is operated'upon by a spring 127, which under normal .conditions is placed under a' tension which tends to throw the hammer toward the platen. At the forward terminal of each hammer `is a hook-128, (Fig. 113), 'which projects into the hammer slot 124 of `the alined type-guide 114. As the coperating segment isV swung downwardly by the actlon of its slide 26,`thel shoulders or noses 122 upon the type of that segment `will be drawn through thehammer hook 128 and said hook willengage one of said noses of the type at any of the adjusted positions of the segment 116 (Fig. 13).k 4Under norma-l conditions, the hammer hooks 128 'each Yengage the coperating zero type, andvhence if there is no adjustment of themachine all hammers operated will print zeros. There is one hammer provided foreach printing unit, which consists of a series of type 120, a. guide 114 and a segment 116.

' Each hammer is provided at its ,rear terminal with a primary lock shoulder 129, and medial of its length with a secondary lock shoulder 130, which is in the form of a tooth having one side thereof beveled or sloped, Figs. 2 and 3. A hammer lock shaft 131 is mounted underthe hammers 126 adjacent to the primary lock Vshouldersv 129 and is interposed between the walls of the casing. The bell crank 132 is mounted upon one terminal of this hammer lock shaft 131 and has the tail 133 thereof contacting with the cam 134L mounted upon the .secondary drive shaft-41.v As thisbell-crank132 is keyed to the hammer lock shaft 131, the oscillation thereof by the cam 134 upon the operation of the secondary drive shaft 41 will oscillate the hammer lock shaft 131. The opposite arm of the bell crank 132 is bent at right angles to the body thereof and extends -in front of all of the primary lock shoulders '129 and holds the `hammers belli cranks 135.

horizontally', the arm 137 being provided with a tooth- 138. at its terminal Which engages: the slwond'ary lock shoulder 130 of the adjacentfhammer; @ne side of the vertical arm 136- of the bell crank is provided with outwardly projectingggY pin 1319., While a lip 1410 extends: froml the other side ofthe said arm in the' same. horizontal plane as the pin 139s. Each bell crank is' acted upon by a spring 141 to hold' the tooth 138 thereof in engagement with the cooperating secondary lock shoulder 130 of the coperatingl hammer; Therefore the pin of one bell vcrank 135 operates'against the lipV 141e()v of the neXt 'adjaflent bell crank of allewerl denominational' order: Each extension 37 of the slides 26 is provided with a shoulder 37, which-is ahmed with the; extremity of vthe arm 13 of the cooperating bell crank of that-order. l

As the slides 26', move forwardly, the eX- tension-S137 thereof movev with them, setting the corresponding segments 11G' of the printing mechanism to-bring thev proper type into the plane of thev printing line to correspond to the key depressed. This; movement of the slides causes the shouldersL 37a of the extensi10ns37 of the, operating slides to contact with the. alined vertical arms 136' of the bell cranks 135. and move said bell cranks against the tension of the springs 125. AsI the slides remain in their forward position during the quarter' tram of the. primary drive. shaft -10 andi duri-ng part: of the complete revolution of the` secondary drive shaft 41, the bell cranks-135 would be held in this position, releasing certain of the hammers. Upon the return movement of the crank 39, the secondary drivel shaft 41 takes a complete revolution, and, as the printing mechanism must be. instantly operated and returned 'to its initial' position prior to any movement ofthe slides, the tail 133'- of the bell crank 132 immediately' operates against the cam' surface of the cam 134, Fig. 3, which causes the op.- posite arm of' said bell 'crank arm to release all ofthe hammers. Thus each hammer released by the bell cranks 135 will -be reciprocated under the influence of its spring 127 to drive the type' set to cooperate with the hook 126'- thereof against the ribbon, to record a digit. The hammers which ,are `not released by the bell cranks 135, which depends entirely upon the slides operated, are

held in their retracted position against the iniiuence of the springs 127, by` said bell cranks. The 'cam surface of the cam 1341 is of such a length that as soon as a record has been made by the type, the tail 133 of the A.bell crank 132 rides upon the body of the lcam, thereby oscillating said bell crank to return all of the hammers released to their normal and inactive positions, as illustrated in Fig 3.

It is desirable and is the practice, in machines of this type, to print zeros to the right ofthe digit of the lowest order recorded, andto accomplish this the pins 139 and lips 140 are provided. If the bell crank 135 of the hundreds denominational'order is operated b-y its cooperating slide 26 and the slides of the tens and nnits denominational orders are not operated to present a different type from the Zero type to the coperating haminers, thepin 139 of bell crank ofthe hnndreds'denominational order will engage thelipl 1110 of the bell crank of the 'tens denominational order, and the pin 139 ofthe bell crank of the tens denominational f order will contact with the lip 140 of the units denominational order and oscillate the bell cranks 135 `about the hammer lock shaft 131 to release the hammers of both the tens and theunits denominational orders. Hence, when the bell crank 132 is oscillated about the hammer lock shaft 131, these hammers of the tens and units orders Will be influenced by their cooperating springs 127 to drive the zero type toward Vthe platen, therelby recording zeros, Without any adjustment lof the segments 116 whatsoever.

vWhen ther sliolfes 26 are returned to their normal and inactive positions, as Will be hereinafter described, the extensions 37 Athereof Will move rearwardly of the Inachin-e, swinging all adjusted segments 116 `back to their initial positions, and perm-it theV bell cranks 135 which have been adjusted to be influenced by the springs 14:1

fto return to their initial positions to engage the secondary lock shoulders 130; Prior to this, however, the prin-ting operation has been completed and all of the hammers 12C, which have been released, have been rcturned" to their original positions by the cam 134 operating against the tail 133 of the bell crank 132.

In order to print the characteristic of each item recorded, that'is to say, whether it was added or subtracted, a pair of keys 142, 1413 are provided adjacent to the keys 77 and 78, Which control the calculations performed by the totalizer. These keys 14.2, 113 cooperate with a slide Vlli, which is provided With an extension 145 but has no rack 36. This extension 1415 of the slide 144 cooperates with a printing segment adjacent to the printing segment of the highest denominational order, which is provided With only two type, one having a D, meaning debit, and one having a C, meaning credit, or similar symbols such as plus and minus. signs. The characteristic printing nent is provided with all of the elements of the Rack return.

After the slides 26 are moved forwardly, performing a calculation upon the totallzer and setting the printing mechanism, andy after the printing mechanism has been operated, it is necessary to return the slides to their original positions, which also resets the printing mechanism. This is accomplished after the movement ofthe primary drive shaft 40 has been completed, and hence after the` gears 67 are out of mesh with the racks 36 and just after the tail 133 of the bell crank 132 has been disengaged lfrom the cam surface of the cam 134.

Mounted for reciprocation upon the primary and secondary drive shafts 40 and 41, respectively, and adjacent to veach terminal thereof, is a return slide 146 Figs. 3, 4, 7 and 10, which return slides are connected at their forward terminals by the return bar 147. These slides 146, in combination with the return bar 147, constitute a frame which vreciprocates horizontally for the return of the slides 26 and is retained at the forfward end of its path ofmovement b-y a spring 148 attached to the bar l147 of one terminal and to the shaft '24 at the other end. Each return slide 146 is provided adjacent to its rear terminal with the,` rack 149, which is arranged to mesh with a mutilated gear 150 mounted on the adjacent terminal of the secondary drive shaft 41.

As the slides 26 are released, the vertical extensions 34 thereof will be moved toward the return bar 147 the position of the vertical extension of each vSlide with respect to said return bar being dependent entirely upon the denominational key depressed.l

When the crank 39 is released to be returned to its initial position under the influence of spring 49, the movement thus imparted to the secondary drive shaft 41 will cause the mutilated gears 150 to rotate., This rotation brings the teeth of the gears150 into engagement with the racks 149, thereby reciprocating the return slides 146 and the return bar 147. As the return bar is thus reciprocated, it engagesthe vertical extensions 34 of such slides as have been operated and resets them to permit the engagement of the lock bar 54 (Fig. 4) by the shoulders 29a of .the slides. At lthe end of this movement of `anism prior to the rslides 26.`

the` return slides 146, the racks 149 thereof are released by the teeth of the gears 150,

as illustrated in Fig. 10, and the entire structure, including the return slides 146 `and the return bar 147, is reciproca-ted in the opposite direction under the influence of the spring 148. The vmutilated gears 150 normally bear the relation to the racks 149 illustrated in Fig. 10, and it willtherefore bemanifest that these gears` will rotate freely prior to the engagement of the racks 149 thereby, and that at the end of the reciprocation of the slides 146 and the bar 147 the gears assume the position shown in Fig. 10. Thus, the secondary drive shaft 41v vis free to rotate to operate the printing mechreturn of any of the Automatic clem".V I

lThis machineis'provided with an automatic clearing mechanism which upon the depression ofa key sets the totalizerj to operate in a reverse direction to that in which it was lastl operated (if last operated addingly), and sets a plurality of dogs to coperate with the clearing wheels of the totalizer. If the machine is operating addingly, it is necessary to set'the totalizer to operate sulbtractingly to clear the same, whereas if itis operating subtractingly no change isl necessary.

An automatic clearing shaft 151, Figs. f1 and 2, is provided adjacent tothe totalizer shaft 58, and is slightly elevated above the same. This automatic clearing shaft 151 carries a plurality ofclearing dogs V152, one dog being provided for each clearing wheel 71, and is alined in the same vertical plane therewith. It will be noted, by reference to Figs. 2, 3, 4 and5, that the automatic clearing shaft 151 acts as a guide for the horias in Fig. 2, so that their terminals are out of the paths of movementof the teeth of the clearing wheels 71. However, when the automatic clearing mechanism is set, the shaftY 151 will be rocked, swinging the terminals of thedogs 152 into'the paths of movement of the teeth of the clearing' gears 71. In order to accomplish this, one terminal of the shaft 151 is provided withan arm 153, Fig. 6, which is pivotally connected to a slide 154, which reciprocates upon one side of the casing of the machine and is offset to have its terminal Vto be alined with the'shaft 80 (Fig. 7). An automatic clearing key 155 is provided in the same keyboard unitas the totalizer controlling keys 77 and78, the stem of which is offset and slotted, as at `156, to

Til() embrace the same side of the shaft 80 as the same, said cam surface 157 providing' a shoulder 158 (Fig. 6) whereby the key 155 is locked' in its depressed position if desired. In order to normally retain the automatic clear key 155 in its elevated position, a retractile spring 159 is. provided, one terminal of which is secured to the key stem and the otherterminal of Which is secured to a stationary part of the machine. A pin 160 extends-transversely from the shaft 80 'and operates ign the slot of said portion 156 of the key stem 155. When it is desired to clear automatically, every slide must be released. It is therefore necessary to. oscillate they lockbars 22 of the keyboard to move the locks 231 thereof from the paths of movement ofthe sl'ides 26. Thisy isv accomplished by the cam surface 155a of the key 155, Which operates against a pin 162b formed on the release bar 162A and engages all ofthe key lock bars 22, as Will hereinafter be more fullyl described.

When theI key 155; is depressed, the cam portion 157 thereof Will operate against the slide 154 to move the saine toward the rear of the machine, Which movement swings the arm 153 to rock the shaft 151, bringing the terminal-s ofthe dogs 152 into the paths of movement of the-teeth of the clearing Wheels 71. l/Vhen the crank 39 is operatedV for- Wardly, all of the slides Will be simultaneously released by cam surface 155a and release bar 162 afterthe totalizer has been set, and Will reciprocate forwardly, which movement is imparted to the totalizer Wheels by the tracksy 36 in the usual manner. Inasmuch as none of the denominational keys of the keyboard have been depressed, they Will not act as stops for the slides and the totalizer wheels` will rotate until the teeth of the carrying Wheels 71 contact With the terminals of thedogs 152. When this occurs, the movement of the slides is arrested and the totalizer Wheels locked' from movement. The clearing'tooth of each clearing Wheel 71 being opposite the zero of each numeral wheel, the digit exhibited at the sight line Will be zero, and consequently the machine will he clear. It is therefore manifest that the dogs 152 act as substitutes for the keys, in arresting or stopping the movement of the slides and the numeral wheels. The slide 154 is returned lto its normal position after the release of the key 155 by the spring 161, which operates on the free terminal of' the slide, as illustrated in Fig. 6.

The direction of rotation of the totalizer is controlled by the pin and slot connection between the key 155 and the vshaft 80. Assuming that the key 77 is depressed for setting the totalizer for adding, the shaft 80 `Will be rocked to bring the pin 166 adjacent to the upper terminal ofthe slot formed in the offset portion 156 of the key 155. Thus, when the. automatic clearing key is def Denominational /ccg/ release.

Irrespective ofthe positions of the slides 26, the depressed key 15 of each denominational series is locked in. such position by the lock ybar 22, consequently in orderto return the keys tol their initial positions it is necessary' to" release said keys from engagement with said lock bars 22. A key release bar` 162 extends transversely of the machine over the lfoc-k bars 2.2 and is proyided with a pluralityl of notches 1163 one ofv which engagesfeach lock .bar 22. The reciprocation off this bar 162` oscillates the lock bars 22 and disengages them from the key locks 20, thereby pern'iitting theretra-ctil'e springs 19 to operate upon the keys to elevate the same. The bar 162 is returned to its normal' position by a spring 1628L (Fig. 3) to` hold the lock bars 22 in their normal positions.

The release ofthe keys must 'be accomplished after the calculation jand' recording, and therefore the release bar 162 is reciprocated after thecompletion ofthe movement of the primary drive shaft 40 and during the last portion of the movement of the secondary drive shaft 41. A key release shaft 164 is mounted longitudinally of' thema- Y chine and extends under therelease bar 162, and carries at its rear terminal an eccentric projection 165', which extends transversely from the shaft Vand cop'erates with the pins 166 formed upon the gear 43 on the primary drive shaft. rFhis gear rotates a' quarter of a revolution, imparting a complete revolution to the secondary drive shaft 41, and consequently to rock the shaft 164 at the t-ermination of each calculation four pins 166 are provided, one for each quarter of aV revolution of the gear Referring to Fig. 4, it Willv be seen 'that during the inactivity of the machine one. of the pins 166 rests adjacent and above the eccentric projection 165 formed on the release shaft 164. When the gear 43 rotates in the direction of the arrow in this figure, its movement is nearly conn Yplete/d When the next pin 166 passes the prothe elevationv thereof. ,The shaft 164 is rocked in the reverse direction after being operated upon 'by one of the pins 166 to bring the projection 165 vinto the path'of the neXt adjacent pin by a centering spring 169 operating `upon the arm 170 keyed to the forward end of the shaft. This spring holds the shaft, under normal conditions,l

so that the eccentric projection 165` thereof rests in a normally horizontal plane.

Repeat leeg/ for each action, the shaft 164 must be so setthat it will not 'be rocked bythe gear 43 toy reciprocate the release bar 162. To accomplish this, a repeatV key 171 is provided, which is slotted as at 172 to coperate with Vthe pin 173 extending' transversely from the i, shaft 164. This pin extends into the slot 172 medial of the length thereof, so that the shaft 164 can oscillate under normal condi-f tions without affecting the key or being lim-` ited in its movement by the key. The repeat key 171 is also provided witha shoulder 174 which locks under the plate 14 of the keyboard carrying the same to retain the key in its depressed position, and is alsoV provided with a retractile spring 175, which normally tends to elevate the key when the said shoulder is released from engagement with the plate 14.

When the key 171 isv depressed until the y' shoulder 174 thereof is' locked under-the plate 14 of the keyboard in which the key 171 reciprocates, the upper terminaliof the slot 172 thereof operates against the pin l17 3 to oscillate the release shaft 164 against the action of the spring 169, thereby swinging the horizontal eccentric projection'165' out of the path of movement Yof the pins 166. This movement ofthe key also swingsfthe pin 167 of said shaft away from the roller bearing 168 of the release bar 162, so that the movement of the shaft under the'influ-V ence of the key 171; does not affect said release bar. fhen the 'key is depressed and locked in this position, the gear 43 will op erate upon the returnrmovement ofthe handle 39 without affecting the release shaft 164, and consequently as said shaft is stationary the release bar 162is'not reciprocated and the denominational keys 15 remain in' their depressed and adjusted pio-1' sitions.

Error lacy.

1f a'number of denominationalkeys be depressed and it isV desired to release the .associated elements. Vof the error key 176, the same is returned to j its initial position by the spring 177, and

sameand` return them to their initial posii tions without operating ythe machine, it \is necessary to reciprocate :the key release bar" 162 independently of the gear 43 and the shaft 164, as the latter areonly affected by theoperation of thewmachine. To accomplish this, a key 17 Gisprovidedl in the same` unit of the keyboard as the repeat key 171 and is operated upon by the retractile spring 177 to retain the same in its elevated position@ This key 176 has a cam surface 178 whichoperatesy against the pin 179 upon` the `opposite side of the release bar 162 to rthe roller bearing 168; Vhen the keyr176 the movement ofthe error key and the release bar, when operated thereby, is wholly independent of the release shaft 164 and its the cam surface 178 thereof disengages the pin 179,- permitting the` slide and lock bars 22 to return to their normal and inactive positions under the infiuence of the spring 1622L (Fig. s). A y Ribbon feed cmd reverse. Mounted upon each side of the casing 111, which incloses the printing machanism, is a Vbracket 180, each bracket having ay spindle 181 journaled thereinto the lower terminal 'of which is 'keyed a bevel gear 182.- Each spindle 181 basa ribbon spool 183 keyed thereto by means of which the ribbon is carried and fed across the printing line of the platen. l

Mounted directly under the spindles 181 Each terminal ofthe shaft is provided with a handlej186 whereby the shaft is reciprocated `loi'agitudinally in the casing,. and it is retained in its adjusted positions by a spring plunger 187 coperating` with the notches 188 in the shaft. Rigidly ,keyed to the "shafts 184 are'two bevel gears189, one bevell gear'for each of the bevel gears 182'secured 'to the spindles 181. These bevel gears 189 are so arranged upon the shaft 184 that when one is in mesh with its coperating and adjacent bevel gear 182, the opposite gear is outof mesh with its coperating and ad jacent bevel gear 182, the meshing o f said gears being determined by the position of After theV depression f 

